I could shine you could shine she could shine we could shine you could shine they could shine
V-ing form
I could be shining you could be shining she could be shining we could be shining you could be shining they could be shining
Perfect
I could have shined, shone you could have shined, shone she could have shined, shone we could have shined, shone you could have shined, shone they could have shined, shone
V-ing perfect
I could have been shining you could have been shining she could have been shining we could have been shining you could have been shining they could have been shining
Negation
Simple form
I could not shine you could not shine she could not shine we could not shine you could not shine they could not shine
V-ing form
I could not be shining you could not be shining she could not be shining we could not be shining you could not be shining they could not be shining
Perfect
I could not have shined, shone you could not have shined, shone she could not have shined, shone we could not have shined, shone you could not have shined, shone they could not have shined, shone
V-ing perfect
I could not have been shining you could not have been shining she could not have been shining we could not have been shining you could not have been shining they could not have been shining
Interrogative form
Simple form
could I shine? could you shine? could she shine? could we shine? could you shine? could they shine?
V-ing form
could I be shining? could you be shining? could she be shining? could we be shining? could you be shining? could they be shining?
Perfect
could I have shined, shone? could you have shined, shone? could she have shined, shone? could we have shined, shone? could you have shined, shone? could they have shined, shone?
V-ing perfect
could I have been shining? could you have been shining? could she have been shining? could we have been shining? could you have been shining? could they have been shining?
Interro-negative form
Simple form
could I not shine? could you not shine? could she not shine? could we not shine? could you not shine? could they not shine?
V-ing form
could I not be shining? could you not be shining? could she not be shining? could we not be shining? could you not be shining? could they not be shining?
Perfect
could I not have shined, shone? could you not have shined, shone? could she not have shined, shone? could we not have shined, shone? could you not have shined, shone? could they not have shined, shone?
V-ing perfect
could I not have been shining? could you not have been shining? could she not have been shining? could we not have been shining? could you not have been shining? could they not have been shining?